First, the infinitive phrase must contain the word "to", so the only options are A and D.
In D "to" is a preposition: it specifies the spacial relation: to the grocery store.
The infinitive phrase is "to go" and the answer is A.
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Soils, forests and minerals are among earth's "Natural Resources".
<span>Oceanography is the study of the ocean and the cryosphere are the portions of the earth that are just frozen water (ice). When fresh water glaciers melt, they lower the salt levels in the ocean and and oceanographer studies that and makes sure that it wont have too much of an effect. The cryosphere plays a significant role in the global climate. </span>
